build(deps-dev): bump core-js in /generators/react/resources (#28414)

Bumps [core-js](https://github.com/zloirock/core-js/tree/HEAD/packages/core-js) from 3.39.0 to 3.40.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/commits/v3.40.0/packages/core-js)

---
updated-dependencies:
- dependency-name: core-js
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

generators/react/resources/package.json

@@ -45,7 +45,7 @@
     "browser-sync": "2.29.3",
     "browser-sync-webpack-plugin": "2.3.0",
     "copy-webpack-plugin": "12.0.2",
-    "core-js": "3.39.0",
+    "core-js": "3.40.0",
     "cross-env": "7.0.3",
     "css-loader": "7.1.2",
     "css-minimizer-webpack-plugin": "7.0.0",